Almost all material has some form of resistance to electrical flow. Without resistance, you’d have no way for a circuit to do useful work. Like stated earlier, conductors are materials that allow current to flow, and insulators don’t. Conductors have little resistance.
Resistance in a circuit is measured in Ohms or the Greek letter “Ω.” Current flowing through an electric range or toaster causes the elements to generate heat to cook your food by using resistance. In Ohm’s Law, resistance is represented by “R.”
All good loads, like a motor or light, will have some form of measurable resistance otherwise current would easily pass through the load without completing any useful work like lighting up the room or moving air throughout your house.
Example: Water flowing through a garden hose without a kink has less resistance and allows water to flow at a faster rate